﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            var abc = "select * from Students";

            var dt = Dbhelper.GetdataTable(abc);

            dataGridView1.DataSource = dt;
        }

        private void button1_Click(object sender, EventArgs e)
        {//查询
            
            
                var query = textBox1.Text;
                var sqlquery = string.Format("select * from Students where Name like'%{0}%'", query);
                var sdf = DbHelper.GetdataTable(sqlquery);
                dataGridView1.DataSource = sdf;
           

        }

        private void button2_Click(object sender, EventArgs e)
        {

        }

        private void button3_Click(object sender, EventArgs e)
        {

        }

        private void button4_Click(object sender, EventArgs e)
        {

        }
    }
}
